BUG: from_address wiped out when using constructor
BUG: from_address wiped out when using constructor

Code incorrectly used `self.from_address = self.set_ship_from_address(...)`.

`set_ship_from_address` has no return value, therefore it wiped out the value of `from_address` when that was assigned.

Correction: remove the assignment, just call the method.
GriceTurrble/python-amazon-mws,Bobspadger/python-amazon-mws